I went through the previous iteration of this last year and I can't recommend it highly enough. @ajonas and the team are doing an awesome service "for Bitcoin" with this program (and the previous incarnations BOSS program, Chaincode residency)

I wrote about my experiences as I went through it: https://github.com/deadmanoz/boss-2025-playground

If you're considering doing this, and want to get the most out of it, I recommend somehow freeing up as much time as you can for ~3 months. I was fortunate in that I had left my previous employment a month or so prior for some time off, so had capacity to get stuck in.